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首页> 外文期刊>Biomaterials Science >Improved cell viability for large-scale biofabrication with photo-crosslinkable hydrogel systems through a dual-photoinitiator approach
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Improved cell viability for large-scale biofabrication with photo-crosslinkable hydrogel systems through a dual-photoinitiator approach

机译:通过双光引发剂方法改善具有光交联水凝胶系统的大规模生物制备的细胞活力

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摘要

Biofabrication with various hydrogel systems allows the production of tissue or organ constructs in vitro to address various challenges in healthcare and medicine. In particular, photocrosslinkable hydrogels have great advantages such as excellent spatial and temporal selectivity and low processing cost and energy requirements. However, inefficient polymerization kinetics of commercialized photoinitiators upon exposure to UV-A radiation or visible light increase processing time, often compromising cell viability. In this study, we developed a hydrogel crosslinking system which exhibited efficient crosslinking properties and desired mechanical properties with high cell viability, through a dual-photoinitiator approach. Through the co-existence of Irgacure 2959 and VA-086, the overall crosslinking process was completed with a minimal UV dosage during a significantly reduced crosslinking time, producing mechanically robust hydrogel constructs, while most encapsulated cells within the hydrogel constructs remained viable. Moreover, we fabricated a large PEGDA hydrogel construct with a single microchannel as a proof of concept for hydrogels with vasculature to demonstrate the versatility of the system. Our dual-photoinitiator approach allowed the production of this photocrosslinkable hydrogel system with microchannels, significantly improving cell viability and processing efficiency, yet maintaining good mechanical stability. Taken together, we envision the concurrent use of photoinitiators, Irgacure 2959 and VA-086, opening potential avenues for the utilization of various photocrosslinkable hydrogel systems in perfusable large artificial tissue for in vivo and ex vivo applications with improved processing efficiency and cell viability.
机译:具有各种水凝胶系统的生物制备允许在体外生产组织或器官构建体,以解决医疗保健和药物的各种挑战。特别地,光胶质链接水凝胶具有很大的优点,例如优异的空间和时间选择性和低处理成本和能量要求。然而,在暴露于UV-A辐射或可见光时,商业化光引发剂的低效聚合动力学增加了辐射或可见光的加工时间,通常会损害细胞活力。在这项研究中,我们开发了一种水凝胶交联系统,通过双光引发剂方法表现出高效的交联特性和具有高细胞活力的所需机械性能。通过IRGACURE 2959和VA-086的共存,在显着减少的交联时间期间,在显着降低的交联时间期间完成整体交联过程,产生机械稳健的水凝胶构建体,而水凝胶构建体内的大多数包封细胞保持活力。此外,我们用单个微通道制造了一种大的PEGDA水凝胶构建体,作为水凝块的概念概念,具有脉管系统,以证明系统的多功能性。我们的双光引发剂方法允许生产这种光胶质链接水凝胶系统,微通道,显着提高细胞活力和加工效率,但保持良好的机械稳定性。我们设想了光引发剂,Irgacure 2959和VA-086的同时使用,用于利用各种光胶质可重新的水凝胶系统在令潜力的大型人工组织中用于体内和离体应用,具有改善的加工效率和细胞活力。

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  • 来源
    《Biomaterials Science》 |2020年第1期|共12页
  • 作者单位

    Nanyang Technol Univ Sch Chem &

    Biomed Engn 70 Nanyang Dr Singapore 637457 Singapore;

    Korea Inst Ind Technol Liquid Proc &

    Casting Technol R&

    D Grp Incheon 406840 South Korea;

    Nanyang Technol Univ Sch Chem &

    Biomed Engn 70 Nanyang Dr Singapore 637457 Singapore;

    Nanyang Technol Univ Sch Chem &

    Biomed Engn 70 Nanyang Dr Singapore 637457 Singapore;

    Korea Inst Ind Technol Liquid Proc &

    Casting Technol R&

    D Grp Incheon 406840 South Korea;

    Nanyang Technol Univ Sch Chem &

    Biomed Engn 70 Nanyang Dr Singapore 637457 Singapore;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 分子生物学;
  • 关键词

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